Recordings were made at the beginning and end of workdays of teachers
who experience vocal fatigue (n = 22) and those who do not experience
fatigue (n = 17). Those who experienced fatigue were recorded on days
in which they did and did not fatigue. Both groups evaluated their voc
al characteristics, each time they made a recording. Subsequently, a l
istener panel evaluated the same characteristics from the recordings.
Both groups estimated the amount and characteristics of their talking
time, completed a psychological evaluation and provided medical histor
ies. The authors interpret the data obtained as indicating that the vo
cal characteristics of teachers who fatigue and those who do not fatig
ue are similar on days the former group does not fatigue and that the
two groups are similar in the amount and loudness of their talking tim
e, at work and at home. However, teachers who fatigue tend to spend mo
re time in activities that appear to be vocally demanding and are more
likely to perceive situations as being anxiety producing. Teachers wh
o fatigue tend to be in good health, but have had more hearing problem
s and allergies than their colleagues and more of their family members
have had voice problems.